Building block



Aug. 26, 1930. F. x. MUENZER 7 BUILDING BLOCK Filed Feb. 28, 1929 Il-llllllllll ll'l Patented Aug. 26, 1930 irED STATES FRANK x. ucnnznmouELMORE, 01-110, assrenoit {no-Tim iam -max humane 1 MACHINERY COMPANY,OEELMORE, OHI'QTA coRPoRATro'NoF OHIO "BUILDING 311.001;

' Application filed February 23,1929. Serial in}.s ..;,287.' Q

a This invention relates to. a building block of concrete orsimilarmateria l, with special reference to its use inthe constructionof chimneys;

The general object; of the inventionto provide a block of thi's kindhaving novel and improved features which facilitate the setting of theblocks, which hold the fine-lining incorrect position, and which serveefficiently as a heat lnsulator.

These various features, in their preferred embodiment, and theadvantages resultmg therefrom, will be more particularly e'x jplalned inconnection with the 'accompany-' ing draw1ngs,' 1n whlch Figure'l is aplan view of a block made according to the lnventlon. I Figure 2is aslde elevation of the same with I a portion broken away on the line 2+2of Figure 1. I

I Figure 3 is an isometricview illustratingthe adaptation of theinvention f-tofchimney j ft will be under'stoodthat these-blocks canconstruction.

As illustrated in the drawings, thejblc ick 5 is in the form of a'hollowsquare, although its precise shape is not material tothe invention. Thewalls oftheblock are formed on their lnner faces with verticallydisposed ribs 6, within which" the :flue lining 7 has a close fit. Thewallsof thejblock are formed with a series of air pockets 8 which extendfrom its bottom face nearlyto thetop of the These pockets serve as 'anon-con ductor of heat'from theflue to the outside of, thewall.In'makingthe block these pockets block.

are formed by cores secured to the'support on which the pallet rests andthe pocketsare preferably tapered to facilitate the iwiths 'drawal ofthe cores when the block islifted from the mold.

The upper faced the block formed with V a channel 9 which preferablyextends continuously about the block near .its 7 outer edge and thebottom' face of the block is formed with a ridgelO adapted to mate withr the channel in asimila-r blockdisposed there beneath.

In laying the blocks one above the other, the

cementror mortar may be sprea'din the channel 9 and'the next block laid'thereon without anyof the cement or mortar Working into the air spaces.The ribs G'serve as accurate guides to retain the flue llm-ng inposition and may 'beeasily chipped off in caseasection of the I fluelining is slightly oversized, while the spaces between the ribs serve asadditional a r ispacesto. prevent conductionyofheat to the y outersurface of the chimney. v I 'Half blocks,'as shown at 11, maybe made byin'serting-a'partition plate across thecene0 ter of the mold. These halfblocks may be laid' adjacent the main chimney toprovide fora smallerauxiliary flue 12, and when so la-id, maybe bondedt'o'the main chimneyby angular metallic strips as indicated at13,or c5 eitherof the flues asindicated at 14 "by in- 7b serting cores in the molds, so thateachof-the adjacentblocks provides half of the r open-f block, it isapparent that the various f ar)" turesthereof may be considerablymodified without departing materially. from the scope I of the inventionas claimed. What I claimis:

1. A chimney block-having" side walls'sa i formedwith internalverticalribsconstitutng 'ing, leaving continuous vertical air spaces atthesides'of each rib, a channel inthe upper face of, each sidewall, aridge on the -.lower face of each side wall inate' with thecorresponding channel in guides adapted to fit againstthe flue linandadapted to similar block disposed therebeneath, and tapered air pocketsextending'upwardlyfrom the bottom surface of the blockin the planes ofthe ridgesand terminating below the up-' per surfaceofthe block." r I I2. A chimneyblockhaving a'chann el'extendingabout its upper face betweenthe innerand'outer edgesthereof, a ridge-onthe 1 lower face of the blockadapted to mate with the corresponding channel in the upper face of asimilar block disposed therebeneath, and tapered air pockets extendingupwardly from the bottom surface of the block in the planes of theridges and terminating below the upper surface of the block.

In testimony whereof I havefhereunto signed my name ,.to thisspecification. v

' FRANK X. MUENZER.

